Stovepipe



April 3, 1928.

Filed March 12. 1927 Patented Apr. 3, 1928.

UNITED STATES WALTER E. HUENEFELD, OF CINCINNATI, OHIO.

STOVEPIPE.

Application filed March 12, 1927. Serial No. 174,770.

This invention relates to improvements in lapsing force when two pipesections are fitted together. 7

A further object is to so construct a stovepipe joint that spreadingwill be efiectually prevented and so that means shall be provided at oneend of the pipe section to prevent collapsing or inward displacement ofthe edges of the pipe relatively to each other, the construction beingsuch that the seam may be closed by hammering without danger of theopening of a portion of the seam while another portion is beinghammered.

A further object is to so construct a stove pipe seam that the same maybe formed at a minimum cost and so that the same may be readilyassembled and secured.

With these and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims.

In the accompanying drawings Figure l is a view of a Stovepipe sectionshowing an embodiment of my invention,

Figure 2 is a View showing the parts which form the joint, separated,and

Figures 3 and 4 are sectlonal views.

The pipe section 1 is made 0t sheet metal bent into substantiallycylindrical form as is customary and well known.

One'edge portion of the pipe section 1s bent outwardly and backwardlyforming a flange 2, then forwardly as at 3, and then inwardly to form aflange 4, whereby a double fold 56 with a hook-shaped edge is formed andseparated by a slot or throat 7 between the inner edges of the flanges 2and 4. The opposite edge portion is bent out wardly backwardly toprovide a flange or hook 8 which extends throughout the major portion ofthe pipe section.

Near one end of the pipe section (prefer ably the upper or crimped endwhich is Intended to enter the lower end of another pipe section) theedge of the sheet on which the flange or hook 8 is formed, is cut at 9,and above such cut, the metal of thesheet forms a tongue 10. I

In joining the edges of the pipe section, the hook or'flange 8 on oneedge portion is caused to engage the hook flange 4 on the other edgeportion of the pipe and made to enter the space formed by the fold 6.The pipe is then so manipulated that the flange 8 will slide relativelyto the flange 4, and the tongue 10 will be passed through the slot orthroat-7 and slid into the space formed by the fold 5, the free edge ofsaid tongue finding an abutment at-the bend of the fold 5 approximatelyat the juncture of the latter with the part 3, and a slightly shoulderedportion 11 of the tongue will pass through the slot or throat 7 A lockis thus formed at one end of the pipe section, and the joint may beclosed by hammering without danger of accidental separation of oneportion of the joint or seam while another portion is being hammered.

When the parts of the joint or seam shall section, and that theinterlocking tongue will 1 be concealed, giving the seam a neat andcontinuous appearance.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. A .pipe section having at one edge a flange extending outwardly, thenparallel to the sheet and then inwardly forming a double fold with ahook shaped edge ex tending from end to end of the section, an outwardlyprojecting hook flange extending approximately from end to end ofthe-opposite edge of the pipe section and engageable with said hookshaped edge, and a tongue projeetingfrom one end portion of the edgehaving said hook flange and adapted to abut against the double fold por-5 tion.

2. A pipe section provided vat one edge portion with an outwardlyprojecting flange, a. member projectin from said flange, and a hookflange at the ree end of said member, 7

the other edge portion of the pipe section 10 having a hook flange toengage said firstmentioned hook flange and also having a tongue enteringunder the member on the first-mentioned outwardly projecting flange.

In testimony whereof, I have signed this 15 specification.

WALTER E. HUENEFELD.

